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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Acquisition-Related Contingent Consideration (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Jul. 01, 2015
Summary of balance and activity of contingent consideration |  |  |  |  |
Period change in valuation | $ (486,044) | $ (295,000) |  |  |
Devicix, LLC |  |  |  |  |
Acquisition-Related Contingent Consideration |  |  |  |  |
Contingent consideration paid |  |  |  |  | $ 2,500,000
Summary of balance and activity of contingent consideration |  |  |  |  |
Beginning fair value of contingent liability | 556,000 | 851,000 |  |  |
Period change in valuation | (483,465) | (294,342) |  |  |
Payments | (2,579) | (658) |  |  |
Ending fair value of contingent liability | 69,956 | 556,000 |  |  |
Balance Sheet Classification |  |  |  |  |
Contingent liability balance | $ 556,000 | $ 851,000 | $ 69,956 | $ 556,000 |
Devicix, LLC | Other accrued liabilities |  |  |  |  |
Balance Sheet Classification |  |  |  |  |
Other Accrued Liabilities |  |  | 21,956 | 21,700 |
Devicix, LLC | Other Long-Term Liabilities |  |  |  |  |
Balance Sheet Classification |  |  |  |  |
Other Long-Term Liabilities |  |  | $ 48,000 | $ 534,300 |
Devicix, LLC | Significant unobservable inputs (Level 3) | Recurring |  |  |  |  |
Acquisition-Related Contingent Consideration |  |  |  |  |
Discount Rate | 21.00% | 21.00% |  |  |
Probability of payment | 33.30% | 33.30% |  |  |

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