Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Accounts receivable net of allowance	$ 0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	15,000,000	15,000,000
Common stock, shares issued (in shares)	7,975,388	6,184,698
Common stock, shares outstanding (in shares)	7,575,742	5,775,171
Treasury stock, shares at cost (in shares)	399,916	399,916
Convertible Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Series C Convertible Preferred Stock
Preferred stock, shares issued (in shares)	280,898	280,898
Preferred stock, shares outstanding (in shares)	280,898	280,898
Series D Convertible Preferred Stock
Preferred stock, shares issued (in shares)	280,898	280,898
Preferred stock, shares outstanding (in shares)	280,898	280,898

Amount of allowance for credit loss on accounts receivable, classified as current.

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