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Stock Based Compensation - Option Plan (Details) - Stock Options - Option Plan	12 Months Ended
	Dec. 31, 2018 $ / shares shares
Stock based compensation
Stock option life (in years)	10 years
Number of shares
Balance at end of year (in shares) | shares	6,600
Weighted-Average Exercise Price
Exercisable at end of year (in dollars per share) | $ / shares	$ 0.002
Weighted- Average Remaining Contractual Term (in Years)
Balance (in years)	4 years 4 months 24 days

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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