Balance Sheets (Parenthetical) - $ / shares shares in Thousands	Jun. 30, 2023	Dec. 31, 2022
Balance Sheets
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000	200,000
Common stock, shares issued	28,813	27,268
Common stock, shares outstanding	28,813	27,268