Established to Offset Deferred Tax Assets (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Deferred tax assets:
Net operating loss carryforward	$ 13,123,326	$ 12,558,554
Research and development credits	549,326	567,439
Stock compensation	864,113	758,751
Derivatives/Warrants	783,315	0
Inventory Reserve	12,470	12,470
Fixed assets	51,960	25,345
Accrued liabilities and other	63,792	46,200
Total deferred tax assets	15,448,302	13,968,759
Valuation allowance	(14,779,566)	(12,999,694)
Net deferred tax assets	668,736	969,065
Deferred tax liabilities
Acquired intangibles	0	0
Patents	(668,736)	(969,065)
Total deferred tax liabilities	(668,736)	(969,065)
Net deferred taxes	$ 0	$ 0