7. Income Taxes - Operating loss tax carryforward (Details)	12 Months Ended
	Dec. 31, 2015 USD ($)
Net Operating losses	$ 32,589,000
Year 1
Year of expiration	Jan. 01, 2018
Net Operating losses	$ 1,425,000
Year 2
Year of expiration	Jan. 01, 2019
Net Operating losses	$ 1,234,000
Year 3
Year of expiration	Jan. 01, 2020
Net Operating losses	$ 2,849,000
Year 4
Year of expiration	Jan. 01, 2021
Net Operating losses	$ 4,168,000
Year 5
Year of expiration	Jan. 01, 2023
Net Operating losses	$ 1,217,000
Year 6
Year of expiration	Jan. 01, 2024
Net Operating losses	$ 646,000
Year 7
Year of expiration	Jan. 01, 2025
Net Operating losses	$ 589,000
Year 8
Year of expiration	Jan. 01, 2026
Net Operating losses	$ 873,000
Year 9
Year of expiration	Jan. 01, 2027
Net Operating losses	$ 2,607,000
Year 10
Year of expiration	Jan. 01, 2028
Net Operating losses	$ 2,512,000
Year 11
Year of expiration	Jan. 01, 2029
Net Operating losses	$ 2,196,000
Year 12
Year of expiration	Jan. 01, 2030
Net Operating losses	$ 1,232,000
Year 13
Year of expiration	Jan. 01, 2031
Net Operating losses	$ 1,028,000
Year 14
Year of expiration	Jan. 01, 2032
Net Operating losses	$ 437,000
Year 15
Year of expiration	Jan. 01, 2033
Net Operating losses	$ 37,000
Year 16
Year of expiration	Jan. 01, 2034
Net Operating losses	$ 6,427,000
Year 17
Year of expiration	Jan. 01, 2035
Net Operating losses	$ 3,112,000