INCOME TAXES (Details - Income Tax Reconciliation when Applying the Statutory Federal Tax Rate) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of income tax provision to amounts computed by statutory federal income tax rate to income (loss) from continuing operations before income taxes
Federal statutory income tax		$ 6,506	$ 9,186	$ 8,998
State income taxes, net		(1,832)	(14,884)	(268)
Excess tax deductions on non-cash compensation		(13,971)	(59,601)	(11,134)
Research and experimentation tax credit		(5,794)	(2,523)	(1,318)
Impact of certain state legislation, net		3,932	0	0
Nondeductible executive compensation		988	163	21
Change in (release of) valuation allowance		954	(12)	593
Uncertain tax positions		922	289	170
Nondeductible meals & entertainment		428	310	90
Impact of Tax Cuts and Jobs Act		0	270	9,062
Other, net		(612)	1,227	77
Income tax (benefit) expense		$ (8,479)	$ (65,575)	$ 6,291
Federal Statutory Income Tax Rate (as a percent)		21.00%	21.00%	35.00%
Provisional estimate for remeasurement of deferred tax assets and liabilities from Tax Cuts and Jobs Act	$ 9,100			$ 9,100
Federal
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards		$ 188,200
State
Operating Loss Carryforwards [Line Items]
State operating loss carryforwards		$ 484,700