Note 6 - Share-Based Compensation - Summary of Stock Options (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Outstanding (in shares) | shares	4,651
Outstanding, weighted exercise price (in dollars per share) | $ / shares	$ 0.64
Outstanding, weighted average contractual term (Year)	7 years 167 days
Outstanding, intrinsic value | $	$ 418
Vested and expected to vest, Options (in shares) | shares	4,651
Vested and expected to vest, weighted exercise price (in dollars per share) | $ / shares	$ 0.64
Vested and expected to vest, weighted average contractual term (Year)	7 years 167 days
Vested and expected to vest, intrinsic value | $	$ 418
Vested and exercisable (in shares) | shares	2,956
Vested and exercisable, weighted exercise price (in dollars per share) | $ / shares	$ 0.74
Vested and exercisable, weighted average contractual term (Year)	6 years 259 days
Vested and exercisable, intrinsic value | $	$ 172