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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Enterprise Wide Disclosures and Foreign Currency Transactions (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2019
Enterprise-Wide Disclosures |  |  |
Property and equipment, net | $ 10,178 | $ 10,176 |
Other assets | 3,906 | 4,122 |
Foreign Currency Transactions |  |  |
Foreign currency translation adjustment | 233 | 101 |
Foreign currency translation adjustment | (132) | (57) |
Net foreign currency transaction gains (losses) | (170) | (192) |
Net Sales | $ 113,370 | $ 112,335 |
Maximum |  |  |
Enterprise-Wide Disclosures |  |  |
Percentage of sales (as a percent) | 10.00% | 10.00% |
ASU 2016-02 | Restatement Adjustment | Minimum |  |  |
Recently Issued and Adopted Accounting Pronouncements |  |  |
Lease assets |  |  | $ 5,500
Lease liabilities |  |  | 5,500
ASU 2016-02 | Restatement Adjustment | Maximum |  |  |
Recently Issued and Adopted Accounting Pronouncements |  |  |
Lease assets |  |  | 6,500
Lease liabilities |  |  | $ 6,500
United States |  |  |
Enterprise-Wide Disclosures |  |  |
Property and equipment, net | $ 8,687 | $ 8,713 |
Other assets | 3,898 | 4,114 |
Mexico |  |  |
Enterprise-Wide Disclosures |  |  |
Property and equipment, net | 821 | 1,003 |
Other assets | 8 | 8 |
China |  |  |
Enterprise-Wide Disclosures |  |  |
Property and equipment, net | $ 670 | $ 460 |
Export sales | Domestic |  |  |
Enterprise-Wide Disclosures |  |  |
Percentage of sales (as a percent) | 4.80% | 4.50% |
Aerospace and Defense |  |  |
Foreign Currency Transactions |  |  |
Net Sales | $ 18,314 | $ 15,683 |
Medical |  |  |
Foreign Currency Transactions |  |  |
Net Sales | 45,082 | 51,449 |
Industrial |  |  |
Foreign Currency Transactions |  |  |
Net Sales | $ 49,974 | $ 45,203 |

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