Annual report pursuant to Section 13 and 15(d)

Schedule II - Valuation and Qualifying Accounts (Details)

v3.8.0.1
Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Allowance for Doubtful Accounts      
Movement in Valuation Allowances and Reserves      
Balance at the Beginning of Period $ 602 $ 312 $ 293
Additions Charged to Cost and Expense 87 388 68
Write-Offs/Other 271 (98) (49)
Balance at End of Period 960 602 312
Reserve for Inventory Valuation      
Movement in Valuation Allowances and Reserves      
Balance at the Beginning of Period 15,410 14,594 12,276
Additions Charged to Cost and Expense 2,885 2,015 3,120
Write-Offs/Other (282) (1,199) (802)
Balance at End of Period 18,013 15,410 14,594
Deferred Tax Valuation Allowance      
Movement in Valuation Allowances and Reserves      
Balance at the Beginning of Period 3,816 2,640 3,134
Additions Charged to Cost and Expense 4,007 1,176 0
Write-Offs/Other 0 0 (494)
Balance at End of Period $ 7,823 $ 3,816 $ 2,640