Employee Stock Purchase Plan	9 Months Ended
Sep. 30, 2019
Postemployment Benefits [Abstract]
Employee Stock Purchase Plan	12. Employee Stock Purchase Plan In January 2019, the number of shares of common stock available for issuance under the ESPP, was increased by 248,359 shares as a result of the automatic increase provision of the ESPP. As of September 30, 2019, the total number of shares of common stock available for issuance under the ESPP was 856,994. During the three and nine months ended September 30, 2019, the Company issued 18,848 and 42,818 shares, respectively. The ESPP is considered a compensatory plan with the related compensation cost expensed over the six-month offering period starting on February 1 and on August 1. The compensation expense related to the ESPP for the three and nine months ended September 30, 2019, was approximately $26,000 and $89,000, respectively. The compensation expense related to the ESPP recorded in the three and nine months ended September 30, 2018, was approximately $36,000 and $94,000, respectively.

The entire disclosure of an entity's employee compensation and benefit plans, excluding share-based compensation and including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, life insurance, severance, health care, unemployment and other benefit plans.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 712
-URI http://asc.fasb.org/topic&trid=2197446

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-URI http://asc.fasb.org/topic&trid=2127225

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