Note 3 - Stock-based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended
	Dec. 30, 2018 USD ($) $ / shares shares
Outstanding (in shares) | shares	1,968,234
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 2.35
Granted, options (in shares) | shares
Granted, weighted average exercise price (in dollars per share) | $ / shares
Exercised, options (in shares) | shares	(268,234)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 2.33
Forfeited (in shares) | shares
Forfeited, weighted average exercise price (in dollars per share) | $ / shares
Outstanding (in shares) | shares	1,700,000
Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 2.35
Outstanding, weighted average remaining contractual term (Year)	2 years 146 days
Outstanding, aggregate intrinsic value | $	$ 16,265
Exercisable, options (in shares) | shares	1,562,000
Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 2.27
Exercisable, weighted average remaining contractual term (Year)	2 years 146 days
Exercisable, aggregate intrinsic value | $	$ 15,068