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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities:    
Net loss $ (4,687) $ (2,922)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation 1,987 2,423
Amortization of intangible assets 5,746 5,431
Amortization of deferred financing costs 385 645
Stock-based compensation expense 3,034 3,044
Impairment charges 1,460
Gain on sale of Denville (1,251)
Provision for allowance for doubtful accounts 288 25
Deferred income taxes (398) (2,861)
Other non-cash charges 188 25
Changes in operating assets and liabilities:    
Accounts receivable 468 (2,792)
Inventories 3,260 2,554
Other current assets 165 (124)
Accounts payable (2,048) 1,593
Accrued income taxes (363) 612
Other current liabilities (1,256) (3,149)
Deferred revenue 121 2,492
Other long-term liabilities (305) (2,861)
Net cash provided by operating activities 8,045 2,884
Cash flows from investing activities:    
Additions to property, plant and equipment (1,216) (986)
Other (15) (16)
Acquisition, net of cash acquired (68,548)
Disposition, net of cash sold 1,002 15,754
Net cash used in investing activities (229) (53,796)
Cash flows from financing activities:    
Proceeds from issuance of debt 4,300 70,700
Repayments of debt (11,703) (20,198)
Payments of debt issuance costs (2,006)
(Net taxes paid) net proceeds from issuance of common stock (221) 4,557
Net cash (used in) provided by financing activities (7,624) 53,053
Effect of exchange rate changes on cash (30) 299
Increase in cash and cash equivalents 162 2,440
Cash and cash equivalents at beginning of period 8,173 5,733
Cash and cash equivalents at end of period 8,335 8,173
Supplemental disclosures of cash flow information:    
Cash paid for interest 5,496 4,987
Cash paid for income taxes, net of refunds $ 374 $ 98