1. Summary of Significant Accounting Policies (Details Narrative) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Stock based compensation costs	$ 481	$ 1,000	$ 1,119	$ 2,153
Unrecognized stock-based compensation costs	2,500		$ 2,500
Unrecognized stock-based compensation costs amortization period			2 years
Aggregate intrinsic value outstanding	7,000		$ 7,000
Aggregate intrinsic value exercisable	$ 6,500		$ 6,500
Options Exercised			483,000	312,500
Total intrinsic value of options exercised			$ 1,400	$ 860
Shares available for future grants	2,873,000		2,873,000
Weighted Average Discount Rate Operating lease	5.00%		5.00%
Weighted Average Discount Rate Finance lease	6.70%		6.70%

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average discount rate for finance lease calculated at point in time.

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Weighted average discount rate for operating lease calculated at point in time.

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Amount of noncash expense for share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of share options (or share units) exercised during the current period.

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