Stockholders' Equity - Stock Repurchases, Cash Dividend (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended	15 Months Ended
	Feb. 27, 2017	Feb. 28, 2017	Feb. 29, 2016	Nov. 30, 2016	Feb. 28, 2017	May 11, 2016
Stock Repurchases
Stock repurchased		$ 1,474
Cash Dividend
Cash dividend paid		$ 1,514	$ 1,546
Cash dividends declared (in dollars per share)		$ 0	$ 0
Common Stock
Stock Repurchases
Stock repurchase program, authorized amount		$ 5,000			$ 5,000	$ 5,000
Stock repurchased (in shares)	28,000	47,173		105,000	152,173
Stock repurchased	$ 880	$ 1,474		$ 3,354	$ 4,828
Common stock repurchase program, remaining authorized amount		$ 172			$ 172