Statements Of Income (USD $)	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Revenue
Product sales	$ 8,348,081	$ 5,974,606
Contract research and development	104,954	202,327
Total revenue	8,453,035	6,176,933
Cost of sales	1,558,346	1,378,355
Gross profit	6,894,689	4,798,578
Expenses
Selling, general , and administrative	629,650	552,804
Research and development	803,428	962,911
Total expenses	1,433,078	1,515,715
Income from operations	5,461,611	3,282,863
Interest income	548,554	526,339
Income before taxes	6,010,165	3,809,202
Provision for income taxes	1,973,055	1,242,377
Net income	$ 4,037,110	$ 2,566,825
Net income per share - basic	$ 0.83	$ 0.53
Net income per share - diluted	$ 0.83	$ 0.53
Weighted average shares outstanding
Basic	4,851,043	4,862,436
Diluted	4,867,459	4,884,902