Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 1,285	$ (3,513)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	539	509
Operating lease asset amortization	1,619	1,664
Impairment of long-lived assets	0	1,078
(Gain) loss on disposal of assets	(1)	142
Stock-based compensation	387	411
Deferred income taxes	19	(220)
Exchange gain	0	(3)
Changes in operating assets and liabilities:
Accounts receivable-trade	(84)	(60)
Inventory	(6,247)	(6,954)
Prepaid expenses	(329)	(63)
Other current assets	(5)	(7)
Accounts payable-trade	405	834
Accrued expenses and other liabilities	44	(679)
Income taxes, net	1,355	(869)
Other assets	(5)	(1,664)
Operating lease liabilities	(1,743)	(1,737)
Total adjustments	(4,046)	(7,618)
Net cash used in operating activities	(2,761)	(11,131)
Cash flows from investing activities:
Purchase of property and equipment	(212)	(285)
Purchase of short-term investments	0	(1,697)
Proceeds from sales of assets	0	1
Proceeds from sales of short-term investments	0	6,310
Net cash provided by (used in) investing activities	(212)	4,329
Cash flows from financing activities:
Proceeds from long-term debt	0	402
Payment of finance lease obligations	(7)	0
Purchase of vested stock for employee payroll tax withholding	(15)	0
Purchase of common stock	(1,675)	0
Net cash provided by (used in) financing activities	(1,697)	402
Effect of exchange rate changes on cash and cash equivalents	45	(91)
Net decrease in cash and cash equivalents	(4,625)	(6,491)
Cash and cash equivalents, beginning of period	10,329	15,905
Cash and cash equivalents, end of period	$ 5,704	$ 9,414