Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Allowance for doubtful accounts receivable | |||
Deducted from asset accounts: | |||
Balance at Beginning of Period | $ 640 | $ 857 | $ 1,197 |
Charged to Costs and Expenses | 271 | 84 | (34) |
Charged to Other Accounts | 0 | 0 | 0 |
Deduction | 295 | 301 | 306 |
Balance at End of Period | 616 | 640 | 857 |
Inventory reserves and obsolescence | |||
Deducted from asset accounts: | |||
Balance at Beginning of Period | 13,176 | 14,407 | 7,869 |
Charged to Costs and Expenses | 3,341 | 3,521 | 10,564 |
Charged to Other Accounts | 0 | 0 | 0 |
Deduction | 4,491 | 4,752 | 4,026 |
Balance at End of Period | $ 12,026 | $ 13,176 | $ 14,407 |