Summary of Business and Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jul. 01, 2019	Jun. 30, 2019
Balance sheet captions:
Prepaid expenses	$ 1,822	$ 2,403	$ 2,517
Total current assets	57,359	56,475	56,589
Operating lease right-of-use assets (Note 6)	3,363	4,494
Total assets	77,975	78,134	73,754
Accrued liabilities	3,067	2,210	2,353
Operating lease liabilities	1,726	1,653
Total current liabilities	38,741	44,204	42,694
Operating lease liabilities, net of current portion	1,837	3,104
Other long-term liabilities	668	718	952
Total liabilities	46,507	53,827	49,447
Total liabilities and stockholders' equity	77,975	78,134	$ 73,754
Operating lease liabilities	$ 3,563	4,800
ASU 2016-02 | Adjustment
Balance sheet captions:
Prepaid expenses		(114)
Total current assets		(114)
Operating lease right-of-use assets (Note 6)		4,494
Total assets		4,380
Accrued liabilities		(143)
Operating lease liabilities		1,653
Total current liabilities		1,510
Operating lease liabilities, net of current portion		3,104
Other long-term liabilities		(234)
Total liabilities		4,380
Total liabilities and stockholders' equity		$ 4,380