Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities
Net loss	$ (10,672)	$ (1,398)
Adjustments to reconcile net loss net cash used in operating activities:
Inventories allowances	48	572
Deferred tax expense	0	184
Depreciation and amortization	1,061	1,033
Share-based compensation expense-stock options	205	215
Share-based compensation expense-restricted stock units	367	162
Loss (gain) on investments	1,021	(310)
Changes in operating assets and liabilities:
Trade accounts receivable	2,850	(1,180)
Inventories	(9,402)	(6,008)
Prepaid expenses and other current assets	(77)	(63)
Other assets	(46)	24
ROU asset and lease liability	(27)	(15)
Accounts payable	7,374	2,401
Accrued compensation and related taxes	362	(113)
Accrued warranty expense	54	(125)
Deferred revenue	190	473
Accrued other expenses and other current liabilities	(166)	529
Net cash used in operating activities	(6,858)	(3,619)
Investing activities
Purchases of property, plant, and equipment	(959)	(1,921)
Net cash used in investing activities	(959)	(1,921)
Financing activities
Proceeds from common stock issuance, net of costs	0	11,559
Cash dividends paid	(1,519)	(836)
Proceeds from the credit facility and notes payable	2,988	3,543
Repayment of the credit facility and notes payable	(198)	(1,465)
Net cash provided by financing activities	1,271	12,801
Net change in cash and cash equivalents	(6,546)	7,261
Cash and cash equivalents, beginning of period	10,580	6,826
Cash and cash equivalents, end of period	4,034	14,087
Supplemental disclosure
Cash paid for interest	93	37
Non-cash financing activity
Common stock issued under restricted stock units	$ 364	$ 184