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Segment Reporting - Schedule of Segment Reporting Information (Details) (Parenthetical) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Net revenues | $ 73,459,000 | $ 49,539,000
Assets of disposal group including discontinued operation including not held for sale | 221,000 | 306,000
Debt issuance costs | 92,000 | 80,000
Net gain on exchange offer of Series B Preferred Stock of subsidiary |  | 1,596,000
Tax benefit from release of valuation allowance on deferred tax assets | 4,000 | (1,108,000)
Financed portion amount in the purchase of capital expenditure | 393,000 | 545,000
Long-lived asset (net) | 1,065,000 | 1,285,000
Perma-Fix [Member] |  |
Long-lived asset (net) | 41,000 | 0
Tax Cuts and Jobs Act [Member] |  |
Tax benefit from release of valuation allowance on deferred tax assets | 1,235,000 |
M&EC [Member] |  |
Net gain on exchange offer of Series B Preferred Stock of subsidiary | 1,596,000 |
Sales Revenue [Member] | Customer Concentration Risk [Member] | Domestic and Foreign Government [Member] |  |
Net revenues | $ 59,985,000 | $ 35,944,000
Concentration risk, percentage | 81.70% | 72.60%

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