CONDENSED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flows used in operating activities
Net income (loss)	$ 72	$ (293)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	47	78
Deferred income taxes	(88)	(18)
Stock-based compensation expense	0	2
Interest accrued on Treasury Bills	(89)	(2)
Change in:
Trade receivables	(41)	(318)
Inventories	(170)	(57)
Other current assets	(10)	17
Accounts payable	82	(30)
Accrued expenses	81	427
Income tax receivable/payable	(20)	(78)
Net cash used in operating activities	(136)	(272)
Cash flows used in investing activities
Purchases of Treasury Bills	(7,906)	(4,992)
Proceeds from the maturity of Treasury Bills	6,000	5,000
Purchase of property and equipment	(1)	(17)
Net cash used in investing activities	(1,907)	(9)
Cash flows used in financing activities
Payments on financing lease	(3)	(3)
Net cash used in financing activities	(3)	(3)
Net decrease in cash and cash equivalents	(2,046)	(284)
Cash and cash equivalents, beginning	7,646	6,713
Cash and cash equivalents, ending	5,600	6,429
Supplemental cash flow information
Cash paid for income taxes	129	17
Cash paid for interest	$ 1	$ 0