Condensed Consolidated Balance Sheets - Unaudited (Parenthetical) - $ / shares	Mar. 31, 2022	Dec. 31, 2021
Preferred stock
Par value (in dollars per share)	$ 0.001	$ 0.001
Shares authorized (in shares)	10,000,000	10,000,000
Shares issued (in shares)	0	0
Common stock
Par value (in dollars per share)	$ 0.001	$ 0.001
Shares authorized (in shares)	100,000,000	100,000,000
Shares issued (in shares)	18,312,000	18,312,000
Shares outstanding (in shares)	18,300,000	18,311,000
Treasury stock
Common shares held (in shares)	12,000	1,000

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