Note 8 - Income Taxes - Reconciliation of Computed Income Tax (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Computed income taxes at 34%	$ (4,229,129)	$ (570,954)
ensv_IncreaseInIncomeTaxesResultingFromAbstract
State and local income taxes, net of federal impact	(373,158)	(50,378)
Change in valuation allowance	389,672
Stock-based compensation	262,136	137,296
Other	13,075	65,783
Total Income Tax Provision	$ (3,937,404)	$ (418,253)