CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 5,703,581	$ 9,369,624
Short-term investments	15,936,157	13,573,057
Accounts receivable, net	6,727,534	6,770,838
Inventories	7,610,645	7,235,043
Other	701,655	571,527
Total current assets	36,679,572	37,520,089
Property, plant, and equipment, net	2,076,023	2,115,316
Goodwill	18,749,888	18,749,888
Other intangible assets, net	8,892,025	9,482,578
Long-term investments	4,186,375	5,344,004
Deferred tax assets and other	161,209	163,427
Total assets	70,745,092	73,375,302
Current liabilities:
Accounts payable	1,988,059	2,689,035
Income taxes payable	54,964	113,191
Accrued liabilities:
Compensation	3,180,858	4,670,640
Deferred revenue	632,311	597,524
Other	1,373,688	838,272
Total current liabilities	7,229,880	8,908,662
Accrued pension liability	325,337	308,918
Deferred rent	627,412	639,019
Other	160,114	278,780
Total liabilities	8,342,743	10,135,379
Shareholders' equity:
Common stock $0.01 par value; 100,000,000 shares authorized, 60,438,959 and 60,436,548 shares issued and outstanding at March 31, 2017 and December 31, 2016, respectively	604,391	604,368
Additional paid-in capital	144,895,047	144,430,381
Accumulated deficit	(82,327,568)	(81,005,654)
Accumulated other comprehensive loss	(769,521)	(789,172)
Total shareholders' equity	62,402,349	63,239,923
Total liabilities and shareholders' equity	$ 70,745,092	$ 73,375,302