STOCKHOLDERS' EQUITY: - Summary of Options (Details)	12 Months Ended
	Mar. 31, 2021 $ / shares shares
Stock options outstanding and exercisable by exercise price range
Options outstanding (in shares) | shares	844,045
Options outstanding - Weighted-average remaining contractual life	3 years 4 months 24 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 15.31
Options exercisable (in shares) | shares	776,744
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 16.53
Range of exercise price per share from $0.61 to $9.99
Stock options outstanding and exercisable by exercise price range
Exercise price per share, low end of range (in dollars per share)	0.61
Exercise price per share, high end of range (in dollars per share)	$ 9.99
Options outstanding (in shares) | shares	152,105
Options outstanding - Weighted-average remaining contractual life	5 years 8 months 12 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 1.30
Options exercisable (in shares) | shares	84,804
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 1.36
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	346,807
Options outstanding - Weighted-average remaining contractual life	2 years 8 months 12 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 15.50
Options exercisable (in shares) | shares	346,807
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 15.50
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	345,133
Options outstanding - Weighted-average remaining contractual life	3 years 1 month 6 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 21.31
Options exercisable (in shares) | shares	345,133
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 21.31