Summary of Significant Accounting Policies - Summary of Impact of New Accounting Standards on Financial Statements (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021
Liabilities
Convertible notes			$ 33,333
Other liabilities			915
Stockholders' equity
Additional paid-in-capital			3,307,613
Accumulated deficit	$ (3,264,603)		(3,264,403)
Non-operating expenses
Interest expense	(1,362)	$ (1,145)
Net loss
Net income (loss)	$ 106	$ (3,701)
Net loss per share (basic and diluted)	$ (0.01)	$ (0.14)
Previously Reported
Liabilities
Convertible notes			22,054
Other liabilities			1,070
Stockholders' equity
Additional paid-in-capital			3,319,767
Accumulated deficit			(3,265,433)
Non-operating expenses
Interest expense		$ (1,307)
Net loss
Net income (loss)		$ (3,863)
Net loss per share (basic and diluted)		$ (0.15)
Adjustment | ASU 2020-06 Adjustment
Liabilities
Convertible notes			11,279
Other liabilities			(155)
Stockholders' equity
Additional paid-in-capital			(12,154)
Accumulated deficit			$ 1,030
Non-operating expenses
Interest expense		$ 162
Net loss
Net income (loss)		$ 162
Net loss per share (basic and diluted)		$ 0.01