BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
BALANCE SHEETS
Allowance for doubtful accounts	$ 191	$ 157
Property plant and equipment, accumulated depreciation	232	210
Intangible assets, accumulated amortization	$ 5,648	$ 5,285
Preferred Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Preferred Stock, Shares Authorized	10,000	10,000
Common Stock, Par or Stated Value Per Share	$ 0.00001	$ 0.00001
Common Stock, Shares Authorized	50,000	50,000
Common Stock, Shares, Issued	11,474	11,435
Common Stock, Shares, Outstanding	11,474	11,435