Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating activities
Net income (loss)	$ 681	$ (1,270)
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:
Inventories allowances	6	(86)
Depreciation and amortization	407	378
Share-based compensation expense-stock options	55	58
Share-based compensation expense-restricted stock units	121	69
Loss on investments	91	113
Changes in operating assets and liabilities:
Trade accounts receivable	(3,565)	(174)
Inventories	1,403	(637)
Prepaid expenses and other current assets	(100)	152
Capitalized product development cost	(147)	0
Other assets	24	(244)
ROU assets and lease liabilities	(15)	(12)
Accounts payable	(755)	1,172
Accrued compensation and related taxes	275	430
Accrued warranty expense	52	78
Deferred revenue	673	820
Accrued other expenses and other current liabilities	8	(289)
Net cash (used in) provided by operating activities	(786)	558
Investing activities
Purchases of property, plant, and equipment	(214)	(592)
Net cash used in investing activities	(214)	(592)
Financing activities
Proceeds from common stock issuance	0	15
Proceeds from the credit facility and notes payable	15,029	20,809
Repayment of the credit facility and notes payable	(14,189)	(19,885)
Net cash provided by financing activities	840	939
Net change in cash and cash equivalents	(160)	905
Cash and cash equivalents, beginning of period	3,456	1,918
Cash and cash equivalents, end of period	3,296	2,823
Supplemental disclosure
Cash paid for interest	202	154
Non-cash financing activity
Common stock issued under restricted stock units	$ 47	$ 31