SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - USD ($) $ in Thousands	1 Months Ended				12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Nov. 30, 2016	Mar. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Asset, Useful Life						10 years
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent						21.00%	35.00%	35.00%
Net Cash Provided by (Used in) Operating Activities		$ 7,500				$ (2,671)	$ (7,512)	$ (14,754)
Defined Benefit Plan, Benefit Obligation, Period Increase (Decrease)								800
Deferred Offering Costs	$ 100					100
Capital Lease Obligations, Noncurrent	2,900					2,900
Increase In Cash From Operating Activities	2,900
Decrease In Cash From Investing Activities	8,100
Net Cash Provided by (Used in) Investing Activities			$ 9,700			(91,622)	$ (1,626)	$ (26,214)
Accounting Standards Update 2016-18 [Member]
Net Cash Provided by (Used in) Operating Activities			$ 4,600
Accounting Standards Update 2016-09 [Member]
Reduction in Real Estate due to Change in Accounting Principle				$ 500
Reduction in Liability related to Stock Based Compensation due to Change in Accounting Principle				5,100
Increase in Additional Paid in Capital due to Change in Accounting Principle				4,400
Increase in Retained Earnings due to Change in Accounting Principle				$ 200
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability	2,400					2,400
Prepaid Expenses and Other Current Assets [Member]
Deferred Offering Costs	$ 5,100					$ 5,100
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					21.00%	21.00%