CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ (734)	$ 113
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	281	293
Stock-based compensation expense	20	26
Loss on disposal of property, plant and equipment	14
Gain on forgiveness of PPP loan	(186)
Operating leases, other	(15)	9
Deferred income taxes	519	(91)
Changes in operating assets and liabilities:
Accounts receivable	33	(383)
Inventories	66	99
Prepaid expenses and other assets	(7)	(62)
Accounts payable	88	(31)
Accrued liabilities	150	32
Accrued income taxes	2	47
Deferred revenue		(13)
Net cash provided by operating activities	231	39
Cash flows from investing activities:
Property, plant and equipment	(159)	(7)
Intangible assets		(83)
Net cash used in investing activities	(159)	(90)
Cash flows from financing activities:
Proceeds from issuance of preferred stock, net of $432 of issuance costs	4,568
Payment of dividends on preferred stock	(48)
Proceeds from PPP loan		186
Net cash provided by financing activities	4,520	186
Effect of exchange rate changes on cash	65	146
Net increase in cash, cash equivalents, and restricted cash	4,657	281
Cash, cash equivalents and restricted cash, beginning of period	6,125	5,844
Cash, cash equivalents and restricted cash, end of period	10,782	6,125
Reconciliation of cash, cash equivalents and restricted cash, end of period:
Cash and cash equivalents, end of period	10,777	6,120
Restricted cash, end of period	5	5
Cash, cash equivalents and restricted cash, end of period	10,782	6,125
Supplemental disclosure of cash flow information:
Income taxes paid	138	137
Supplemental non-cash investing and financing activities:
Lease liabilities arising from obtaining right-of-use assets	$ 50	$ 334