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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Operating activities    
Net income (loss) $ 5,647 $ (574)
Depreciation 205 310
Amortization of intangible assets 54 383
Amortization of right-of-use assets 213 136
Amortization of debt issuance cost 8 21
Deferred income tax expense (benefit) 1,577 (193)
Change in receivable reserves (74) (156)
Change in inventory reserves 32 17
Gain on sale of subsidiary (4,207)  
Unrealized gain on short term investments (3,341)  
Accrued pension (30) 8
Stock-based compensation 5 148
Other   12
Foreign currency remeasurement loss   36
Changes in current operating assets and liabilities:    
Accounts receivable (885) 210
Inventories (238) (1,297)
Prepaid expenses and other assets (120) (906)
Income taxes 12 1
Accounts payable and accrued liabilities 2,013 2,900
Net cash provided by operating activities 871 1,056
Investing activities    
Additions to property, plant and equipment (56) (152)
Net cash used in investing activities (56) (152)
Financing activities    
Bank overdrafts (1,294) (160)
Short term borrowings 1,785 (2,045)
Borrowing under debt agreement 5,259 11,347
Repayment of debt (6,403) (9,881)
Payment of debt issuance cost   6
Principal repayments of financing leases (128) (124)
Net cash used in financing activities (781) (857)
Increase in cash and cash equivalents 34 47
Effect of foreign exchange on cash and cash equivalents (70) 3
Cash and cash equivalents    
Beginning of period 211 218
End of period $ 175 $ 268