Revenue Recognition - Schedule of Disaggregation of Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 20,937,437	$ 12,733,262	$ 36,956,967	$ 26,789,135
Gross Profit	$ 3,365,315	$ 2,190,478	$ 5,583,797	$ 4,692,485
Margin	16.10%	17.20%	15.10%	17.50%
Echo Environmental, LLC [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 2,358,800
Gross Profit	1,095,487
Jewelry [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	4,093,488	$ 4,525,109	$ 8,395,236	$ 9,825,072
Gross Profit	$ 1,240,299	$ 1,020,470	$ 2,565,957	$ 2,617,091
Margin	30.30%	22.60%	30.60%	26.60%
Bullion/Rare Coin [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 10,937,998	$ 6,608,590	$ 20,922,144	$ 13,708,341
Gross Profit	$ 509,628	$ 847,585	$ 1,025,785	$ 1,401,366
Margin	4.70%	12.80%	4.90%	10.20%
Scrap [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 1,748,028	$ 1,181,941	$ 2,966,179	$ 2,465,585
Gross Profit	$ 256,914	$ 233,887	$ 441,961	$ 443,371
Margin	14.70%	19.80%	14.90%	18.00%
Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 1,799,123	$ 417,622	$ 2,314,608	$ 790,137
Gross Profit	$ 262,987	$ 88,536	$ 454,607	$ 230,657
Margin	14.60%	21.20%	19.60%	29.20%
Subtotal [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 18,578,637	$ 12,733,262	$ 34,598,167	$ 26,789,135
Gross Profit	$ 2,269,828	$ 2,190,478	$ 4,488,310	$ 4,692,485
Margin	12.20%	17.20%	13.00%	17.50%
Subtotal [Member] | Echo Environmental, LLC [Member] | 5/20/19 - 6/30/2019 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 2,358,800		$ 2,358,800
Gross Profit	$ 1,095,487		$ 1,095,487
Margin	46.40%	0.00%	46.40%	0.00%
Recycle [Member] | Echo Environmental, LLC [Member] | 5/20/19 - 6/30/2019 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 1,588,084		$ 1,588,084
Gross Profit	$ 747,819		$ 747,819
Margin	47.10%	0.00%	47.10%	0.00%
Reuse [Member] | Echo Environmental, LLC [Member] | 5/20/19 - 6/30/2019 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Revenues	$ 770,716		$ 770,716
Gross Profit	$ 347,668		$ 347,668
Margin	45.10%	0.00%	45.10%	0.00%