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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:    
Net income (loss) $ 175 $ (1,050)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation expense 2,225 2,270
Deferred income tax expense (11) 41
Stock-based compensation expense 162 19
Bad debt expense 0 144
Gain on disposal of fixed assets 0 (11)
Income (loss) from equity investment in joint venture (421) 114
Deferred compensation costs (15) 0
Change in operating assets and liabilities, net of acquisitions:    
Accounts receivable (707) (356)
Due to (from) related parties 15 (19)
Inventories 68 82
Prepaid expenses and other current assets (200) 991
Increase (Decrease) in Accounts Payable and Accrued Liabilities 1,268 (1,902)
Other 4 26
Net cash provided by operating activities 2,563 349
Cash flows from investing activities:    
Acquisition of fixed assets (298) (112)
Proceeds on sales of fixed assets 0 11
Net cash used in investing activities (298) (101)
Cash flows from financing activities:    
Proceeds on long-term borrowings 0 0
Payments on long-term borrowings 0 0
Payments on long-term borrowings from related parties (783) (768)
Proceeds from short-term notes payable 0 0
Payments on short-term notes payable (296) (237)
Net cash used in financing activities (1,079) (1,005)
Effect of exchange rate changes on cash 62 (60)
Net increase (decrease) in cash and cash equivalents 1,248 (817)
Cash and cash equivalents, beginning of period 1,814 3,979
Cash and cash equivalents, end of period 3,062 3,162
Supplemental disclosure of cash flow information:    
Interest paid 162 251
Income taxes paid 5 0
Non-cash investing and financing activities:    
Equipment acquired under capital leases $ 104 $ 0