EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY: Reconciliation of basic and diluted earnings (loss) per share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Basic loss per share:
Net loss	$ (3,015)	$ (1,300)
Basic weighted-average shares outstanding (in shares)	76,935	78,672
Basic earnings (loss) per share (in USD per share)	$ (0.04)	$ (0.02)
Diluted loss per share:
Basic weighted-average shares outstanding (in shares)	76,935	78,672
Dilutive effect of common stock options, warrants, and restricted stock as computed under the treasury stock method (in shares)	0	0
Diluted weighted-average shares outstanding (in shares)	76,935	78,672
Diluted earnings (loss) per share (in USD per share)	$ (0.04)	$ (0.02)