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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Cash flows from operating activities:    
Net loss $ (1,967,000) $ (451,000)
Adjustments to reconcile net loss to net cash used by operating activities:    
Depreciation and amortization 360,000 294,000
Stock based compensation 90,000 31,000
Unrealized gain on investment (4,000)
Amortization of deferred financing costs and debt discount 1,000
Impairment of goodwill 685,000
Decrease (increase) in assets:    
Accounts receivable 630,000 (278,000)
Inventory (35,000) 218,000
Prepaid expenses and other current assets (54,000) 1,000
Other assets (4,000)
Increase (decrease) in liabilities:    
Accounts payable (3,000) (101,000)
Accrued expenses (167,000) (213,000)
Other liabilities (378,000)
Net cash used by operating activities (469,000) (876,000)
Cash flows from investing activities:    
Purchase of property, plant and equipment (105,000) (211,000)
Purchase of marketable securities (566,000)
Note receivable investment (462,000)
Purchase of intangible assets (350,000)
Net cash used by investing activities (1,133,000) (561,000)
Cash flows from financing activities:    
Payments of long-term debt (121,000) (57,000)
Borrowings of long-term debt 200,000
Borrowings from revolving lines of credit, net 300,000
Borrowings from convertible of note 500,000
Issuances of common stock, net of issuance costs 3,929,000 (7,000)
Net cash provided by financing activities 4,308,000 436,000
Net increase (decrease) in cash 2,706,000 (1,001,000)
Cash at beginning of period 1,096,000 2,448,000
Cash at end of period $ 3,802,000 $ 1,447,000