Schedule of Quarterly Financial Information [Table Text Block] |
The following tables present the quarterly information for the years ended December 31, 2013, 2012 and 2011, respectively: | | Three Months Ended | | | | March 31 | | June 30 | | September 30 | | December 31 | | Fiscal 2013: | | | | | | | | | | | | | | Product sales | | $ | 1,846,734 | | $ | 1,366,493 | | $ | 1,234,701 | | $ | 1,559,248 | | Gross margin | | | 1,053,567 | | | 783,677 | | | 615,717 | | | 607,644 | | Product development expenses | | | 266,479 | | | 271,858 | | | 290,853 | | | 325,010 | | Net operating income (loss) | | | 326,666 | | | 23,722 | | | (159,967) | | | (209,975) | | Net income (loss) | | | 204,310 | | | 6,452 | | | 57,336 | | | (150,703) | | Net income (loss) per common share: | | | | | | | | | | | | | | Basic | | $ | 0.07 | | $ | 0.00 | | $ | 0.02 | | $ | (0.05) | | Diluted | | $ | 0.07 | | $ | 0.00 | | $ | 0.02 | | $ | (0.05) | | | | | | | | | | | | | | | | Fiscal 2012: | | | | | | | | | | | | | | Product sales | | $ | 1,717,109 | | $ | 1,175,126 | | $ | 1,076,749 | | $ | 1,420,951 | | Gross margin | | | 1,012,568 | | | 670,518 | | | 620,958 | | | 750,215 | | Product development expenses | | | 247,807 | | | 211,706 | | | 223,771 | | | 234,316 | | Net operating income (loss) | | | 281,233 | | | 37,397 | | | (86,126) | | | 12,497 | | Net income (loss) | | | 154,761 | | | 15,187 | | | (63,574) | | | (16,862) | | Net income (loss) per common share: | | | | | | | | | | | | | | Basic | | $ | 0.05 | | $ | 0.01 | | $ | (0.02) | | $ | (0.01) | | Diluted | | $ | 0.05 | | $ | 0.01 | | $ | (0.02) | | $ | (0.01) | | | | | | | | | | | | | | | | Fiscal 2011: | | | | | | | | | | | | | | Product sales | | $ | 1,555,701 | | $ | 1,247,443 | | $ | 1,003,451 | | $ | 1,304,548 | | Gross margin | | | 868,235 | | | 694,526 | | | 526,034 | | | 725,009 | | Product development expenses | | | 472,134 | | | 672,763 | | | 304,082 | | | 271,076 | | Net operating (loss) income | | | (16,858) | | | (432,860) | | | (192,390) | | | 9,382 | | Net loss | | | (23,113) | | | (258,218) | | | (127,649) | | | (530) | | Net loss per common share: | | | | | | | | | | | | | | Basic | | $ | (0.01) | | $ | (0.09) | | $ | (0.04) | | $ | (0.00) | | Diluted | | $ | (0.01) | | $ | (0.09) | | $ | (0.04) | | $ | (0.00) | | |