Summary of Significant Accounting Policies, Accounting Pronouncements Adopted and Not Yet Adopted (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Accounting Pronouncements Recently Adopted [Abstract]
Cash (used in) provided by operating activities	$ (3,483)	$ 7,262
Cash provided by (used in) financing activities	6,463	(1,114)
Accounting Pronouncements Not Yet Adopted [Abstract]
Accumulated deficit	(42,569)	$ (42,870)
ASU 2016-15 [Member]
Accounting Pronouncements Recently Adopted [Abstract]
Cash (used in) provided by operating activities	(400)
Cash provided by (used in) financing activities	400
ASU 2016-02 [Member] | Minimum [Member] | Plan [Member]
Accounting Pronouncements Not Yet Adopted [Abstract]
Operating lease liability	2,500
Right of use assets	2,500
Accumulated deficit	200
ASU 2016-02 [Member] | Maximum [Member] | Plan [Member]
Accounting Pronouncements Not Yet Adopted [Abstract]
Operating lease liability	3,500
Right of use assets	3,500
Accumulated deficit	$ 400