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STOCK-BASED COMPENSATION: - Summary of Options (Details)	3 Months Ended
	Jun. 30, 2020 $ / shares shares
Stock options outstanding and exercisable by exercise price range
Options outstanding (in shares) | shares	1,301,203
Options outstanding - Weighted-average remaining contractual life	3 years 3 months 18 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 14.85
Options exercisable (in shares) | shares	1,236,810
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 15.52
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	188,424
Options outstanding - Weighted-average remaining contractual life	5 years 1 month 6 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 1.58
Options exercisable (in shares) | shares	124,031
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 1.44
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	709,672
Options outstanding - Weighted-average remaining contractual life	2 years 3 months 18 days
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 14.69
Options exercisable (in shares) | shares	709,672
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 14.69
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	403,107
Options outstanding - Weighted-average remaining contractual life	4 years
Options outstanding - Weighted-average exercise price per share (in dollars per share)	$ 21.31
Options exercisable (in shares) | shares	403,107
Options exercisable - Weighted-average exercise price per share (in dollars per share)	$ 21.31

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
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- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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