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Shareholders' Equity (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Restricted stock and restricted stock units granted (in shares)	(70,755)	(343,667)
Employee Stock Option
Balance at the beginning of the period (in shares)	824,932	297,000
Shares reserved (in shares)		900,000
Stock options exercised (in shares)		0
Balance at the end of the period (in shares)	823,557	824,932
Balance at the beginning of the period (in shares)	372,927	366,346
Stock options exercised (in shares)		(2,276)
Balance at the end of the period (in shares)	297,199	372,927
Balance at the beginning of the period (in dollars per share)	$ 2.36	$ 2.41
Stock options exercised (in dollars per share)		1.18
Cancelled or forfeited (in dollars per share)	1.95
Balance at the end of the period (in dollars per share)	$ 2.38	$ 2.36
Aggregate Intrinsic Value, Stock options exercised (in dollars)	$ 0	$ 705
Employee Stock Option | Stock Option Plan 2013
Cancelled or forfeited (in shares)	20,492	51,230
Cancelled or forfeited (in shares)	(20,492)	(51,230)
Cancelled or forfeited (in dollars per share)	$ 2.10	$ 2.17
Employee Stock Option | Stock Option Plan 2018
Restricted stock and restricted stock units granted (in shares)	(70,755)
Stock options granted (in shares)		(119,515)
Cancelled or forfeited (in shares)	13,570
Stock options granted (in shares)		119,515
Cancelled or forfeited (in shares)	(13,570)
Stock options granted (in dollars per share)		$ 1.95
Employee Stock Option | Incentive Stock Option Plan 2003 [Member]
Cancelled or forfeited (in shares)		0
Cancelled or forfeited (in shares)	(41,666)	(59,428)
Cancelled or forfeited (in dollars per share)	$ 2.46	$ 2.09
Restricted Stock and Restricted Stock Units | Stock Option Plan 2013
Restricted stock and restricted stock units granted (in shares)		(178,000)
Cancelled or forfeited (in shares)	21,748	39,884
Cancelled or forfeited (in shares)		0
Cancelled or forfeited (in dollars per share)	$ 1.72	$ 1.22
Restricted Stock and Restricted Stock Units | Stock Option Plan 2018
Restricted stock and restricted stock units granted (in shares)		(165,667)
Cancelled or forfeited (in shares)	13,570
Cancelled or forfeited (in dollars per share)	$ 1.95

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- Definition

Gross number of share options (or share units) available for grant during the period.

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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