Note 6 - Stock-based Compensation - Option Activity (Details)	3 Months Ended
	Jun. 02, 2019 $ / shares shares
Outstanding options (in shares) | shares	540,709
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 13.49
Outstanding options, granted (in shares) | shares	114,450
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 16.44
Outstanding options, exercised (in shares) | shares	(6,200)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 11.91
Outstanding options, terminated or expired (in shares) | shares	(66,750)
Terminated or expired, weighted average exercise price (in dollars per share) | $ / shares	$ 18.83
Outstanding options (in shares) | shares	582,209
Balance, weighted average exercise price (in dollars per share) | $ / shares	$ 13.47
Balance, June 2, 2019 (Year)	4 years 69 days
Vested and exercisable (in shares) | shares	436,609
Vested and exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 13.10
Vested and exercisable, weighted average remaining contractual term (Year)	5 years 164 days