Property and equipment (Details) - USD ($)	3 Months Ended			9 Months Ended		21 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Dec. 31, 2015
Property and equipment
Total property and equipment	$ 5,433,036			$ 5,433,036		$ 5,433,036	$ 5,163,309
Less: Accumulated depreciation and amortization	(4,111,694)			(4,111,694)		(4,111,694)	(3,351,690)
Property and equipment, net	1,321,342			1,321,342		1,321,342	1,811,619
Depreciation and amortization expense	328,181		$ 164,538	768,740	$ 489,010
Accelerated Depreciation on abandoned assets	150,000	$ 100,000		300,000
Equipment
Property and equipment
Total property and equipment	1,008,798			1,008,798		$ 1,008,798	958,175
Equipment | Minimum
Property and equipment
Estimated useful life						2 years
Equipment | Maximum
Property and equipment
Estimated useful life						7 years
Computer hardware
Property and equipment
Total property and equipment	3,409,750			3,409,750		$ 3,409,750	3,266,233
Computer hardware | Minimum
Property and equipment
Estimated useful life						3 years
Computer hardware | Maximum
Property and equipment
Estimated useful life						5 years
Furniture and fixtures
Property and equipment
Total property and equipment	227,851			227,851		$ 227,851	192,565
Furniture and fixtures | Minimum
Property and equipment
Estimated useful life						5 years
Furniture and fixtures | Maximum
Property and equipment
Estimated useful life						7 years
Leasehold improvements
Property and equipment
Total property and equipment	$ 786,637			$ 786,637		$ 786,637	$ 746,336
Leasehold improvements | Minimum
Property and equipment
Estimated useful life						3 years
Leasehold improvements | Maximum
Property and equipment
Estimated useful life						10 years