Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2022	Mar. 31, 2021
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	5,000,000	5,000,000
Preferred stock, issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	50,000,000	50,000,000
Common stock, issued (in shares)	19,104,751	19,045,386
Common stock, outstanding (in shares)	19,104,751	19,045,386
Series A Junior Participating Preferred Stock [Member]
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	20,000	20,000
Preferred stock, issued (in shares)	0	0