Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Current assets
Cash	$ 6,959	$ 11,980
Accounts receivable, net of allowance for credit losses of $2 and $3, respectively	208	237
Inventory	77	66
Prepaid expenses	984	1,297
Total current assets	8,228	13,580
Other assets	421	578
Total assets	8,649	14,158
Current liabilities
Accounts payable	750	948
Accrued expenses	3,468	2,268
Notes payable, net of deferred financing costs	134	525
Liability classified warrants	1	1
Total current liabilities	4,353	3,742
Total liabilities	4,353	3,742
Commitments and contingencies (Note 10)
Stockholders’ equity
Preferred stock - $0.0001 par value, 10,000,000 shares authorized at June 30, 2026 and December 31, 2025; no shares issued and outstanding at June 30, 2026 and December 31, 2025	0	0
Common stock - $0.0001 par value per share; 425,000,000 and 450,000,000 shares authorized at June 30, 2026 and December 31, 2025, respectively; 4,259,842 and 3,844,613 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively	4	4
Additional paid-in capital	163,257	162,126
Accumulated deficit	(158,965)	(151,714)
Total stockholders’ equity	4,296	10,416
Total liabilities and stockholders’ equity	$ 8,649	$ 14,158