Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Activities:
Net income from continuing operations	$ 153	$ 3,417
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	3,027	3,019
Intangible asset amortization	267	144
Stock-based compensation	2,921	2,479
Loss on disposal/sale of property and equipment	113	21
Restructuring costs	353	(29)
Bad debt provision	(44)	(151)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(896)	960
Inventories	(2,481)	2,076
Prepaid expenses and other assets	531	638
Accounts payable	14	1,086
Income taxes payable	3	(10)
Other accrued liabilities	1,417	(231)
Deferred revenue	295	1
Net cash provided by operating activities	5,673	13,420
Investing Activities:
Capital expenditures	(2,330)	(4,093)
Purchase of investments	(25,928)	(49,701)
Redemptions/maturities of short-term investments	38,588	47,035
Cash paid for acquisition, net of cash acquired	(6,277)	0
Net cash provided by (used in) investing activities	4,053	(6,759)
Financing Activities:
Proceeds from issuance of common stock	840	869
Proceeds from Paycheck Protection Program Loan	0	3,500
Repayment of Paycheck Protection Program Loan	0	(3,500)
Payment of withholding tax on stock-based compensation	(786)	(1,137)
Principle payments on finance leases	(73)	(78)
Purchase of common stock from repurchase program	(3,193)	(3,808)
Cash dividends	(4,034)	(4,108)
Net cash used in financing activities	(7,246)	(8,262)
Net increase (decrease) in cash and cash equivalents	2,480	(1,601)
Effect of exchange rate changes on cash	(49)	268
Cash and cash equivalents, beginning of year	5,761	7,094
Cash and Cash Equivalents, End of Year	8,192	5,761
Other information:
Cash paid for income taxes	30	29
Cash paid for interest	7	8
Non-cash investing and financing information:
Increases (Decreases) to additional paid-in capital related to restricted stock	88	(188)
Issuance of restricted common stock, net of cancellations	575	28
Recognition of ROU assets under operating leases	245	2
Recognition of ROU assets under finance leases	$ 63	$ 0