Net 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 Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net loss used to compute basic and diluted loss per share	$ (1,184)	$ (4,640)	$ (9,206)	$ (8,852)	$ (4,719)	$ (9,382)	$ (15,030)	$ (22,953)
Weighted average common shares used in computing net loss per share:
Weighted average shares used to compute basic and diluted loss per share	87,962			85,459			87,220	84,594