The Company and its Significant Accounting Policies - 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								12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net loss used to compute basic and diluted loss per share	$ (946)	$ (8,852)	$ (4,719)	$ (9,382)	$ (5,255)	$ (5,029)	$ (9,369)	$ (9,926)	$ (23,899)	$ (29,579)	$ (25,504)
Weighted average common shares used in computing net loss per share:
Weighted average shares used to compute basic and diluted loss per share	85,677	85,459	84,586	83,747	83,179	82,913	82,328	81,576	84,893	82,495	80,509