CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 10,431,068	$ 9,369,624
Short-term investments	14,275,494	13,573,057
Accounts receivable, net	7,313,021	6,770,838
Inventories	7,235,436	7,235,043
Other	616,166	571,527
Total current assets	39,871,185	37,520,089
Property, plant, and equipment, net	2,186,034	2,115,316
Goodwill	18,749,888	18,749,888
Other intangible assets, net	8,303,379	9,482,578
Long-term investments	2,218,223	5,344,004
Deferred tax assets and other	162,044	163,427
Total assets	71,490,753	73,375,302
Current liabilities:
Accounts payable	1,644,109	2,689,035
Income taxes payable	90,762	113,191
Accrued liabilities:
Compensation	3,536,817	4,670,640
Deferred revenue	629,538	597,524
Other	1,281,043	838,272
Total current liabilities	7,182,269	8,908,662
Accrued pension liability	360,429	308,918
Deferred rent	613,888	639,019
Other	62,426	278,780
Total liabilities	8,219,012	10,135,379
Shareholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; none issued or outstanding at June 30, 2017 and December 31, 2016, respectively	0	0
Common stock $0.01 par value; 100,000,000 shares authorized, 60,914,778 and 60,436,548 shares issued and outstanding at June 30, 2017 and December 31, 2016, respectively	609,149	604,368
Additional paid-in capital	145,226,680	144,430,381
Accumulated deficit	(81,907,939)	(81,005,654)
Accumulated other comprehensive loss	(656,149)	(789,172)
Total shareholders' equity	63,271,741	63,239,923
Total liabilities and shareholders' equity	$ 71,490,753	$ 73,375,302