Consolidated Balance Sheets (USD $)	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 506,903	$ 2,763,420
Accounts receivable (see Note 3)	2,332,019	1,198,939
Inventories (see Note 4)	2,890,511	2,539,190
Prepaid expenses	135,361	192,269
Total current assets	5,864,794	6,693,818
Property, equipment and leaseholds, net (see Note 5)	8,205,514	7,867,672
Patents (see Note 6)	208,206	225,180
Long term deposits (see Note 7)	7,733	7,895
Deferred tax asset (see Note 11)	219,000	199,000
Total Assets	14,505,247	14,993,565
Current
Accounts payable and accrued liabilities	514,890	512,380
Deferred revenue	312,392	250,000
Income taxes payable	437,998	620,000
Current portion of long term debt (see Notes 8 and 9)	979,389	122,726
Total current liabilities	2,244,669	1,505,106
Long term debt (see Note 9)	1,647,603	2,206,075
Total liabilities	3,892,272	3,711,181
Capital stock (see Note 15)
Authorized 50,000,000 common shares with a par value of $0.001 each, Issued and outstanding: 13,169,991 (2010: 13,962,567) common shares	13,170	13,963
Authorized 1,000,000 preferred shares with a par value of $0.01 each	0	0
Capital in excess of par value	15,864,348	16,638,227
Other comprehensive income (see Note 10)	477,139	554,865
Accumulated Deficit	(5,741,682)	(5,924,671)
Total Stockholders' Equity	10,612,975	11,282,384
Total Liabilities and Stockholders' Equity	$ 14,505,247	$ 14,993,565