Inventory - Additional Information (Detail) (USD $)	0 Months Ended						3 Months Ended
	Aug. 06, 2014 PurchaseOrder	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2014 Hand-held Imager Assemblies [Member]	Aug. 06, 2014 Hand-held Imager Assemblies [Member]	Sep. 30, 2014 Obsolete Inventory [Member]	Dec. 31, 2013 Obsolete Inventory [Member]	Sep. 30, 2014 MelaFind Systems [Member]	Dec. 31, 2013 MelaFind Systems [Member]	Dec. 31, 2013 MelaFind Systems [Member] Components [Member]	Sep. 30, 2014 Inventory Repairs [Member]
Inventory [Line Items]
Additions to reserve							$ 537,774
Inventory, Gross		6,765,120	5,956,205		1,142,512				4,240,506	4,858,088	5,401,866
Reserve for inventory		1,401,333	325,000	[1]			862,774	325,000				538,559
Settlement amount						$ 1,142,512
Number of unfulfilled purchase orders	2

[1] Derived from the audited balance sheet as of December 31, 2013