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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Cash flows from operating activities:    
Net Loss $ (4,516) $ (2,370)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 484 538
Amortization of intangible assets 1,427 1,430
Amortization of deferred financing costs 98 91
Stock-based compensation expense 793 591
Provision for allowance for doubtful accounts 4 348
Other non-cash charges (166) 4
Changes in operating assets and liabilities:    
Accounts receivable 5,149 2,331
Inventories (1,413) (1,416)
Other current assets (767) 536
Accounts payable 1,322 (118)
Accrued income taxes 6 380
Other current liabilities 1,411 (76)
Deferred revenue (256) (116)
Other long-term liabilities (705) (143)
Net cash provided by operating activities 2,871 2,010
Cash flows from investing activities:    
Additions to property, plant and equipment (241) (143)
Other (9)
Net cash used in investing activities (241) (152)
Cash flows from financing activities:    
Repayments of debt (4,829) (4,583)
Taxes paid for issuance of stock (242) (421)
Net cash used in financing activities (5,071) (5,004)
Effect of exchange rate changes on cash (12) 3
Decrease in cash and cash equivalents (2,453) (3,143)
Cash and cash equivalents at beginning of period 8,335 8,173
Cash and cash equivalents at end of period 5,882 5,030
Supplemental disclosures of cash flow information:    
Cash paid for interest 1,237 1,406
Cash paid for income taxes $ 110 $ 94