Stockholders' Equity - Schedule of Series C Preferred Stock Outstanding, Conversion Shares and Future Dividends (Detail) shares in Thousands	12 Months Ended
	Jun. 30, 2021 $ / shares shares
Series C-1 Preferred Shares [Member]
Class Of Stock [Line Items]
Number	16,564
Preferred stock | $ / shares	$ 1.16
Number of conversion shares (in thousands)	14,279
Dividend Shares (in thousands)	9,995
Series C-2 Preferred Shares [Member]
Class Of Stock [Line Items]
Number	1,148
Preferred stock | $ / shares	$ 1.214
Number of conversion shares (in thousands)	946
Dividend Shares (in thousands)	662
Series C3 Preferred Shares
Class Of Stock [Line Items]
Number	2,380
Preferred stock | $ / shares	$ 1.15
Number of conversion shares (in thousands)	2,070
Dividend Shares (in thousands)	1,449
Preferred Stock Series C
Class Of Stock [Line Items]
Number	20,092
Number of conversion shares (in thousands)	17,295
Dividend Shares (in thousands)	12,106
Preferred Stock Series C | 10% - August 19, 2021 [Member]
Class Of Stock [Line Items]
Dividend Shares (in thousands)	1,729
Preferred Stock Series C | 15% - August 19, 2022 [Member]
Class Of Stock [Line Items]
Dividend Shares (in thousands)	2,594
Preferred Stock Series C | 20% - August 19, 2023 [Member]
Class Of Stock [Line Items]
Dividend Shares (in thousands)	3,459
Preferred Stock Series C | 25% - August 19, 2024 [Member]
Class Of Stock [Line Items]
Dividend Shares (in thousands)	4,324