Consolidated Balance Sheets (Parenthetical) - $ / shares	Aug. 31, 2019	Feb. 28, 2019
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	2,376,406	2,168,094
Common Class A [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	60,000,000	60,000,000
Common stock, shares issued	24,306,194	24,106,194
Common stock, shares outstanding	21,929,788	21,938,100
Common Class B [Member]
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	10,000,000	10,000,000
Common stock, shares issued	2,260,954	2,260,954
Common stock, shares outstanding	2,260,954	2,260,954