Net Income (Loss) Per Common Share - Schedule of reconciliation of the numerator and denominator used in the calculation of basic and diluted net income (loss) per common share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net income (loss)	$ 2,625	$ 10,710	$ (9,356)	$ (1,184)	$ (4,640)	$ (9,206)	$ 3,979	$ (15,030)
Denominator:
Weighted average shares outstanding - basic	90,476			87,962			89,585	87,220
Dilutive effect of potential common shares	379						844
Weighted average shares outstanding - diluted	90,855			87,962			90,429	87,220
Basic net income (loss) per share	$ 0.03			$ (0.01)			$ 0.04	$ (0.17)
Diluted net income (loss) per share	$ 0.03			$ (0.01)			$ 0.04	$ (0.17)