Share-Based Compensation (Details 1) - $ / shares	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock Issued or Granted During Period, Share-based Compensation
Number of service-based options granted	140,000	1,715,200	1,182,883	1,716,700
Weighted average grant date fair value	$ 1.84	$ 1.83	$ 1.82	$ 1.84
Weighted average exercise price	$ 3.45	$ 3.29	$ 3.42	$ 3.30

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration