Condensed Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 121,604	$ 165,249
Accounts receivable, net of allowance for doubtful accounts of $178,481 as of March 31, 2013 and $179,259 as of December 31, 2012	1,319,666	978,982
Inventories, net	625,549	638,561
Advances on contracts	429,583	476,969
Prepaid expenses and other current assets	165,942	239,061
Total current assets	2,662,344	2,498,822
Accounts receivable-long term, net of allowance for doubtful accounts of $112,762 as of March 31, 2013 and $167,971 as of December 31, 2012	81,098	119,201
Advances on contracts	2,358,107	2,350,477
Investment in Milestone Education LLC	50,000
Furniture, Fixtures & Equipment net of accumulated depreciation of $463,109 as of March 31, 2013 and $458,708 as of December 31, 2012	33,080	36,624
Patents, net of accumulated amortization of $439,931 as of March 31, 2013 and $420,556 as of December 31, 2012	638,409	648,662
Other assets	7,317	7,317
Total assets	5,830,355	5,661,103
Current Liabilities:
Accounts payable	2,030,272	2,336,594
Accrued interest on Notes Payable	380,982	581,407
Accrued expenses and other payables	551,206	356,563
Total current liabilities	2,962,460	3,274,564
Long-term Liabilities:
Notes Payable	450,000	450,000
Total long-term liabilities	450,000	450,000
Total liabilities	3,412,460	3,724,564
Commitments and Contingencies
Stockholders' Equity
Common stock, par value $.001; authorized 50,000,000 shares; 16,781,726 shares issued 1,655,317 shares to be issued and 16,748,393 shares outstanding as of March 31, 2013; 16,563,306 shares issued, 1,635,709 shares to be issued, and 16,529,973 shares outstanding as of December 31, 2012	18,437	18,199
Additional paid-in capital	64,890,596	64,560,224
Accumulated deficit	(61,579,622)	(61,730,368)
Treasury stock, at cost, 33,333 shares	(911,516)	(911,516)
Total stockholders' equity	2,417,895	1,936,539
Total liabilities and stockholders' equity	$ 5,830,355	$ 5,661,103