Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Outstanding Series C Agent Warrants (Detail)

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Stockholders' Equity - Schedule of Outstanding Series C Agent Warrants (Detail) - Series C Warrants [Member]
9 Months Ended
Mar. 31, 2021
$ / shares
shares
Issued warrants to underwriters 2,449
Number of conversion shares 2,104,000
Cumulative common stock dividends 1,473,000
Series 1 Warrants Outstanding  
Issued warrants to underwriters 1,934
Warrants exercise price | $ / shares $ 1.16
Number of conversion shares 1,667,000
Cumulative common stock dividends 1,167,000
Series 2 Warrants Outstanding Member  
Issued warrants to underwriters 219
Warrants exercise price | $ / shares $ 1.21
Number of conversion shares 180,000
Cumulative common stock dividends 126,000
Series 3 Warrants Outstanding  
Issued warrants to underwriters 296
Warrants exercise price | $ / shares $ 1.15
Number of conversion shares 257,000
Cumulative common stock dividends 180,000