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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Recently Adopted Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
ASSETS
Right-of-use assets - operating leases	$ 1,640	$ 2,268
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of operating lease obligation	330	1,358
Noncurrent portion of operating lease obligation	1,307	905
Deferred income tax liabilities	3,416	1,701	1,700
Accumulated Surplus	$ 112,261	81,358	$ 81,354
Lease, Practical Expedients, Package [true false]	true
ASU 2016-02 | Cumulative Effect Adjustment
ASSETS
Right-of-use assets - operating leases		2,268
LIABILITIES AND SHAREHOLDERS' EQUITY
Current portion of operating lease obligation		1,358
Noncurrent portion of operating lease obligation		905
Deferred income tax liabilities		1
Accumulated Surplus		$ 4

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