Segment and Enterprise-Wide Disclosures - Net Sales to Unaffiliated Customers by Geography (Detail) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Segment Reporting Information [Line Items] | |||
| Net sales | $ 78,352 | $ 71,097 | $ 64,549 |
| United States [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Net sales | 45,177 | 41,545 | 39,240 |
| Germany [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Net sales | 9,090 | 7,639 | 6,939 |
| Other Countries [Member] | |||
| Segment Reporting Information [Line Items] | |||
| Net sales | $ 24,085 | $ 21,913 | $ 18,370 |