Industry Segment and Operations by Geographic Areas - Revenues By Customer Location (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Total revenues	$ 6,326,785	$ 5,837,544	$ 11,528,980	$ 10,365,766
United States of America [Member]
Segment Reporting Information [Line Items]
Total revenues	4,572,808	5,145,676	8,487,467	8,672,963
Europe [Member]
Segment Reporting Information [Line Items]
Total revenues	1,744,907	604,268	2,830,003	1,537,907
Other [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 9,070	$ 87,600	$ 211,510	$ 154,896