STOCK-BASED COMPENSATION: Summary of Options (Details)	6 Months Ended
	Sep. 30, 2022 $ / shares shares
Stock options outstanding and exercisable by exercise price range
Options outstanding (in shares) | shares	556,482
Options outstanding - Weighted-average remaining contractual life	2 years 2 months 12 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 17.40
Options exercisable (in shares) | shares	536,509
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 18.02
Range of exercise price per share from $0 to $9.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	0
Exercise price per share, high end of range (in dollars per share)	$ 9.99
Options outstanding (in shares) | shares	72,544
Options outstanding - Weighted-average remaining contractual life	4 years 10 months 24 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 0.97
Options exercisable (in shares) | shares	52,571
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 1.03
Range of exercise price per share from $10.00 to $19.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	10.00
Exercise price per share, high end of range (in dollars per share)	$ 19.99
Options outstanding (in shares) | shares	182,603
Options outstanding - Weighted-average remaining contractual life	2 years 7 months 6 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 17.49
Options exercisable (in shares) | shares	182,603
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 17.49
Range of exercise price per share from $20.00 to $24.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	20.00
Exercise price per share, high end of range (in dollars per share)	$ 24.99
Options outstanding (in shares) | shares	301,335
Options outstanding - Weighted-average remaining contractual life	1 year 3 months 18 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 21.31
Options exercisable (in shares) | shares	301,335
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 21.31