CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Operating activities
Net loss	$ (2,230)	$ (11,633)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Allowance for credit losses	0	170
Inventory allowance	591	81
Amortization of deferred finance and other assets	150	0
Deferred tax expense	0	0
Depreciation and amortization	1,635	1,423
Share-based compensation expense -stock options	200	271
Share-based compensation expense-restricted stock units	1,143	404
Unrealized loss on investment	740	313
(Gain) on sale of equipment	0	(1)
Changes in operating assets and liabilities:
Trade accounts receivable	2,714	(2,557)
Inventories	(2,437)	(5,208)
Prepaid expenses and other current assets	(314)	56
Other assets	(279)	(45)
Operating lease ROU assets and lease liabilities	(54)	(38)
Accounts payable	(3,077)	7,015
Accrued compensation and related taxes	159	44
Accrued warranty expense	131	58
Deferred revenue	2,921	884
Accrued other expenses and other current liabilities	(338)	(237)
Net cash provided by (used in) operating activities	1,655	(9,000)
Investing activities
Purchases of property, plant and equipment	(2,117)	(1,750)
Net cash used in investing activities	(2,117)	(1,750)
Financing activities
Dividends paid	0	(2,029)
Proceeds from issuance of common stock	1,063	0
Proceeds from issuance of common stock warrants	1,000	0
Proceeds from credit facility and notes payable	74,908	9,722
Repayment of credit facility and notes payable	(74,971)	(5,605)
Net cash provided by financing activities	2,000	2,088
Net change in cash and cash equivalents	1,538	(8,662)
Cash and cash equivalents, beginning of year	1,918	10,580
Cash and cash equivalents, end of year	3,456	1,918
Supplemental disclosure
Interest paid	660	190
Non-cash financing activity
Common Stock issued under restricted stock units	890	364
Cashless exercise of stock options and related conversion of net shares to stockholders' equity	$ 4	$ 0