Accrued Liabilities - Schedule of Accrued Liabilities (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accrued salaries, bonus, and benefits	$ 1,481,466	$ 1,491,844
Accrued licenses and maintenance fees	483,879	577,389
Accrued warranties	146,468	149,464	$ 164,365
Accrued taxes	204,679	192,268
Accrued professional services	216,938	489,017
Other	368,771	383,960
Total accrued liabilities	2,902,201	3,283,942
Less: Long term accrued liabilities	(260,947)	(641,461)
Total current accrued liabilities	$ 2,641,254	$ 2,642,481