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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 11, 2019 | Mar. 21, 2018 | Mar. 12, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases, Rent Expense, Net |  |  |  | $ 300,000 | $ 200,000 |  |
Capital leases of lessee, Interest Rate |  |  |  | 7.25% |  |  |
Amortization of Leased Asset |  |  |  | $ 29,000 | 48,000 |  |
New Haven, Connecticut Operating Lease [Member] | Minimum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases, Rent Expense, Monthly |  |  |  | 13,400 |  |  |
New Haven, Connecticut Operating Lease [Member] | Maximum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases, Rent Expense, Monthly |  |  |  | 14,600 |  |  |
Omaha, Nebraska Operating Lease [Member] | Minimum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases, Rent Expense, Monthly |  |  |  | 2,300 |  |  |
Omaha, Nebraska Operating Lease [Member] | Maximum |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Operating Leases, Rent Expense, Monthly |  |  |  | 2,800 |  |  |
Mount Sinai |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, damages sought |  |  |  |  |  | $ 700,000 |
Loss contingency accrual |  |  |  | 0 | 500,000 |  | $ 700,000
Litigation Settlement, Installment Payment Amount |  |  |  | $ 9,472 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 10.00% |  |  |
Secured Debt |  |  |  | $ 500,000 |  |  |
Debt Instrument, Periodic Payment |  |  |  | $ 9,472 |  |  |
Class of Warrant or Right, Outstanding |  |  |  | 24,900 |  |  |
Class of Warrant or Right, Exercise Price of Warrants or Rights |  |  |  | $ 7.50 |  |  |
Class of Warrant or Right, Term |  |  |  | 5 years |  |  |
XIFIN, Inc. |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, damages sought |  |  |  | $ 270,000 |  |  |
Loss contingency accrual |  |  |  | 100,000 | $ 200,000 |  |
Loss Contingency Accrual, Payments |  |  |  | 100,000 |  |  |
CPA Global |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency, damages sought |  |  |  | 200,000 |  |  |
Loss contingency accrual |  |  |  | 100,000 |  |  |
Crede Capital Group LLC |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Litigation settlement in favor of other party, amount |  |  | $ 1,925,000 |  |  |  |
Leviston [Member] |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Loss contingency accrual |  |  |  | $ 700,000 |  |  |
Bio-Rad Laboratories |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Litigation settlement in favor of other party, amount |  | $ 39,000 |  |  |  |  |
Loss Contingency Accrual, Payments |  | $ 100,000 |  |  |  |  |
Bio-Rad Laboratories | Subsequent Events |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Damages paid | $ 39,000 |  |  |  |  |  |

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