Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 3,006	$ 3,232
Accounts receivable	525	556
Prepaid expenses	462	421
Other current assets	27	16
Total current assets	4,020	4,225
Other investment	5,350	5,350
Total assets	9,370	9,575
Current liabilities:
Accounts payable	462	390
Accrued research and development costs	72	52
Accrued expenses and other current liabilities	266	283
Total current liabilities	800	725
Commitments and contingencies (Note 7)	0	0
Stockholders' equity
Preferred stock, no par value, 100,000,000 shares authorized and 351,037 shares of Series A convertible preferred stock issued and outstanding at June 30, 2025 and December 31, 2024	0	0
Common stock, no par value, 400,000,000 shares authorized atJune 30, 2025 and December 31, 2024; 3,210,094 and 2,710,096 shares issued at June 30, 2025 and December 31, 2024, respectively; 3,060,944 and 2,545,922 shares outstanding at June 30, 2025 and December 31, 2024, respectively	0	0
Paid-in capital	277,815	276,342
Accumulated deficit	(269,245)	(267,492)
Total stockholders' equity	8,570	8,850
Total liabilities and stockholders' equity	$ 9,370	$ 9,575