Segments and Geographic Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
Jun. 30, 2019 |
|
| Segment Reporting Information [Line Items] | |||||
| Revenues | $ 1,258,722,000 | $ 1,266,986,000 | $ 3,795,326,000 | $ 3,932,988,000 | |
| Gross profit | $ 22,475,000 | $ 8,716,000 | $ 38,946,000 | $ 25,508,000 | |
| Gross margin percentage by segment | 1.786% | 0.688% | 1.026% | 0.649% | |
| Selling, general, and administrative expenses | $ (10,388,000) | $ (8,258,000) | $ (26,528,000) | $ (24,080,000) | |
| Interest income | 5,968,000 | 4,807,000 | 17,968,000 | 14,010,000 | |
| Interest expense | (5,051,000) | (4,239,000) | (15,274,000) | (12,447,000) | |
| Other income (expense), net | 463,000 | 373,000 | 447,000 | 1,303,000 | |
| Unrealized income (loss) on foreign exchange | (45,000) | (36,000) | (42,000) | (54,000) | |
| Total net income (loss) before provision for income taxes | 13,422,000 | 1,363,000 | 15,517,000 | 4,240,000 | |
| Total depreciation and amortization | (883,000) | (690,000) | (2,217,000) | (2,088,000) | |
| Advertising expense | (756,000) | (619,000) | (1,565,000) | (1,857,000) | |
| Total precious metals held under financing arrangements | 187,005,000 | 187,005,000 | $ 208,792,000 | ||
| Total inventories | 413,129,000 | 413,129,000 | 292,861,000 | ||
| Assets | 940,957,000 | 940,957,000 | 705,362,000 | ||
| Long term assets | 41,278,000 | 41,278,000 | 36,512,000 | ||
| Total capital expenditures on property and equipment | 232,000 | 152,000 | 686,000 | 290,000 | |
| Intangibles, including goodwill | 14,115,000 | 14,115,000 | 14,733,000 | ||
| United States | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 1,072,071,000 | 1,148,787,000 | 2,958,735,000 | 3,493,306,000 | |
| Total inventories | 399,645,000 | 399,645,000 | 280,924,000 | ||
| Assets | 926,749,000 | 926,749,000 | 689,287,000 | ||
| Long term assets | 41,225,000 | 41,225,000 | 36,459,000 | ||
| Europe | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 59,367,000 | 47,997,000 | 214,777,000 | 186,758,000 | |
| Total inventories | 11,273,000 | 11,273,000 | 3,944,000 | ||
| Assets | 11,997,000 | 11,997,000 | 8,082,000 | ||
| Long term assets | 53,000 | 53,000 | 53,000 | ||
| North America, excluding United States | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 110,676,000 | 67,637,000 | 577,908,000 | 246,306,000 | |
| Total inventories | 2,016,000 | 2,016,000 | 7,452,000 | ||
| Assets | 2,016,000 | 2,016,000 | 7,452,000 | ||
| Asia Pacific | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 14,291,000 | 2,295,000 | 33,226,000 | 5,252,000 | |
| Africa | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 31,000 | 1,000 | |||
| Australia | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 2,317,000 | 270,000 | 10,649,000 | 1,365,000 | |
| Asia | |||||
| Segment Reporting Information [Line Items] | |||||
| Total inventories | 195,000 | 195,000 | 541,000 | ||
| Assets | 195,000 | 195,000 | 541,000 | ||
| Wholesale Trading & Ancillary Services | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 1,234,165,000 | 1,251,385,000 | 3,733,252,000 | 3,893,886,000 | |
| Gross profit | $ 19,749,000 | $ 6,934,000 | $ 33,106,000 | $ 21,150,000 | |
| Gross margin percentage by segment | 1.60% | 0.554% | 0.887% | 0.543% | |
| Selling, general, and administrative expenses | $ (7,973,000) | $ (5,618,000) | $ (19,253,000) | $ (16,525,000) | |
| Interest income | 2,376,000 | 2,052,000 | 6,868,000 | 6,458,000 | |
| Interest expense | (2,946,000) | (2,401,000) | (8,215,000) | (7,255,000) | |
| Other income (expense), net | 278,000 | 373,000 | 392,000 | 1,436,000 | |
| Unrealized income (loss) on foreign exchange | (45,000) | (36,000) | (42,000) | (54,000) | |
| Total net income (loss) before provision for income taxes | 11,439,000 | 1,304,000 | 12,856,000 | 5,210,000 | |
| Total depreciation and amortization | (375,000) | (386,000) | (1,175,000) | (1,177,000) | |
| Advertising expense | (294,000) | (115,000) | (362,000) | (383,000) | |
| Total precious metals held under financing arrangements | 187,005,000 | 187,005,000 | 208,792,000 | ||
| Total inventories | 382,225,000 | 382,225,000 | 268,383,000 | ||
| Assets | 775,967,000 | 775,967,000 | 561,902,000 | ||
| Long term assets | 35,886,000 | 35,886,000 | 32,816,000 | ||
| Total capital expenditures on property and equipment | 225,000 | 26,000 | 600,000 | 164,000 | |
| Intangibles, including goodwill | 11,902,000 | 11,902,000 | 12,087,000 | ||
| Direct Sales | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 24,557,000 | 15,601,000 | 62,074,000 | 39,102,000 | |
| Gross profit | $ 2,726,000 | $ 1,782,000 | $ 5,840,000 | $ 4,358,000 | |
| Gross margin percentage by segment | 11.101% | 11.422% | 9.408% | 11.145% | |
| Selling, general, and administrative expenses | $ (1,749,000) | $ (2,246,000) | $ (5,877,000) | $ (6,472,000) | |
| Interest expense | (342,000) | ||||
| Other income (expense), net | (219,000) | (157,000) | |||
| Total net income (loss) before provision for income taxes | 977,000 | (464,000) | (256,000) | (2,613,000) | |
| Total depreciation and amortization | (227,000) | (304,000) | (726,000) | (911,000) | |
| Advertising expense | (456,000) | (499,000) | (1,192,000) | (1,465,000) | |
| Total inventories | 7,825,000 | 7,825,000 | 7,611,000 | ||
| Assets | 21,523,000 | 21,523,000 | 13,317,000 | ||
| Long term assets | 3,984,000 | 3,984,000 | 3,416,000 | ||
| Total capital expenditures on property and equipment | 3,000 | 35,000 | 10,000 | 35,000 | |
| Intangibles, including goodwill | 2,213,000 | 2,213,000 | 2,646,000 | ||
| Secured Lending | |||||
| Segment Reporting Information [Line Items] | |||||
| Revenues | 0 | ||||
| Gross profit | 0 | ||||
| Selling, general, and administrative expenses | (666,000) | (394,000) | (1,398,000) | (1,083,000) | |
| Interest income | 3,591,000 | 2,755,000 | 11,099,000 | 7,552,000 | |
| Interest expense | (2,105,000) | (1,838,000) | (7,059,000) | (4,850,000) | |
| Other income (expense), net | 186,000 | 275,000 | 24,000 | ||
| Total net income (loss) before provision for income taxes | 1,006,000 | 523,000 | 2,917,000 | 1,643,000 | |
| Total depreciation and amortization | (281,000) | (316,000) | |||
| Advertising expense | (6,000) | (5,000) | (11,000) | (9,000) | |
| Total inventories | 23,079,000 | 23,079,000 | 16,867,000 | ||
| Assets | 143,467,000 | 143,467,000 | 130,143,000 | ||
| Long term assets | 1,408,000 | 1,408,000 | $ 280,000 | ||
| Total capital expenditures on property and equipment | $ 4,000 | $ 91,000 | $ 76,000 | $ 91,000 | |