Annual report pursuant to Section 13 and 15(d)

Note 2 - Accounting Policies - Schedule of Allowances for Discount (Detail)

v3.6.0.2
Note 2 - Accounting Policies - Schedule of Allowances for Discount (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accounting Policies [Abstract]    
Allowance for discount, beginning balance $ 3,707 $ 1,862
Charges against revenues 34,627 29,525
Utilization of reserve (36,575) (27,680)
Allowance for discount, ending balance $ 1,759 $ 3,707