CONDENSED CONSOLIDATED SATEMENTS OF CASH FLOWS $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Cash flows from operating activities:
Net income	$ 254	$ 20
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	131	145
Unrealized (gains) losses on marketable securities	(381)	0
Stock-based compensation	0	5
Gain on forgiveness of PPP loan	0	(186)
Adjustment to reconcile operating lease expense to cash paid	(5)	(9)
Loss on disposal of property and equipment	0	14
Deferred taxes	0	1
Changes in operating assets and liabilities:
Accounts receivable	361	(60)
Inventories	(226)	(7)
Prepaid expenses and other assets	(56)	225
Accounts payable	74	127
Accrued liabilities	(210)	(50)
Accrued income taxes	86	9
Net cash provided by operating activities	28	234
Cash flows from investing activities:
Purchases of marketable securities	(6,027)	0
Purchases of property, plant and equipment	(9)	(142)
Net cash used in investing activities	(6,036)	(142)
Cash flows from financing activities:
Payment of dividends on preferred stock	(200)	0
Net cash used in financing activities	(200)	0
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(167)	33
Net (decrease) increase in cash and cash equivalents	(6,375)	125
Cash, cash equivalents and restricted cash, beginning of period	10,782	6,125
Cash, cash equivalents and restricted cash, end of period	4,407	6,250
Reconciliation of cash, cash equivalents and restricted cash, end of period:
Cash and cash equivalents, end of period	4,402	6,245
Restricted cash, end of period	5	5
Cash, cash equivalents and restricted cash, end of period	4,407	6,250
Supplemental disclosure of cash flow information:
Income taxes paid (refunded), net	160	(67)
Interest paid	0	0
Supplemental disclosure of non-cash investing and financing activities:
Lease liabilities arising from obtaining right-of-use assets	$ 178	$ 50