1. Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Stock based compensation costs	$ 638	$ 1,186
Unrecognized stock-based compensation costs	$ 3,000
Unrecognized stock-based compensation costs amortization period	1 year 9 months 18 days
Aggregate intrinsic value outstanding	$ 6,200
Aggregate intrinsic value exercisable	$ 6,200
Options Exercised	78,000	307,850
Total intrinsic value of options exercised	$ 227	$ 849
Shares available for future grants	2,873,000
Lease Liability	$ 23,327
Lease right-of-use asset	$ 21,869
Weighted Average Discount Rate Operating lease	5.00%

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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