Income Taxes - Schedule of Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($) |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Deferred tax assets (liabilities) | ||
| Bad debts | $ 62,000 | $ 102,000 |
| Inventories | 110,000 | 580,000 |
| Compensation | 296,000 | 108,000 |
| Depreciation and amortization | (18,115,000) | (18,338,000) |
| Deferred Tax Assets, Other | 2,996,000 | 3,051,000 |
| Valuation allowance | (411,000) | (434,000) |
| Net deferred tax (liabilities) | (15,062,000) | (14,931,000) |
| Classified in the Consolidated Balance Sheets as follows: | ||
| Net current deferred tax asset | 0 | 895,000 |
| Net long-term deferred tax (liability) | $ (15,062,000) | $ (15,826,000) |