Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Total subscription, maintenance and support revenue	$ 48,120	$ 38,263	$ 93,862	$ 75,787
Total revenue	63,878	47,426	120,009	95,336
Cost of Goods and Services Sold	23,583	18,724	44,373	38,245
Cost of subscription, maintenance and support	12,614	11,444	25,141	23,165
Gross profit	40,295	28,702	75,636	57,091
Operating Expenses
Selling and Marketing Expense	22,945	18,590	44,430	36,158
General and Administrative Expense	12,040	10,145	23,707	20,834
Research and development	17,455	12,960	33,254	27,744
Business Combination, Acquisition Related Costs	0	0	0	95
Income from operations	(12,145)	(12,993)	(25,755)	(27,740)
Other income (expense):
Convertible debt interest and amortization	(4,274)	(4,226)	(8,630)	(8,405)
Other Nonoperating Income (Expense)	(862)	244	409	446
Loss before income tax provision	(17,281)	(16,975)	(33,976)	(35,699)
Income tax provision (benefit)	236	(131)	458	1
Net income (loss)	$ (17,517)	$ (16,844)	$ (34,434)	$ (35,700)
Earnings Per Share, Basic	$ (0.44)	$ (0.52)	$ (0.89)	$ (1.10)
Net earnings (loss) per share:
Earnings Per Share, Basic and Diluted	(0.44)	(0.52)	(0.89)	(1.10)
Earnings Per Share, Diluted	$ (0.44)	$ (0.52)	$ (0.89)	$ (1.10)
Weighted average number of shares:
Weighted Average Number of Shares Outstanding, Basic and Diluted	39,413	32,651	38,518	32,514
Weighted Average Number of Shares Outstanding, Basic	39,413	32,651	38,518	32,514
Other comprehensive income, net of tax:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ 178	$ (789)	$ (92)	$ (262)
Other comprehensive income	178	(789)	(92)	(262)
Comprehensive income (loss)	(17,339)	(17,633)	(34,526)	(35,962)
Subscription and Circulation [Member]
Revenue from Contract with Customer, Including Assessed Tax	33,080	22,038	63,495	42,988
Cost of Goods and Services Sold	9,779	8,491	19,504	17,255
Maintenance [Member]
Revenue from Contract with Customer, Including Assessed Tax	15,040	16,225	30,367	32,799
Cost of Goods and Services Sold	2,835	2,953	5,637	5,910
License [Member]
Revenue from Contract with Customer, Including Assessed Tax	2,028	695	2,534	1,761
Cost of Goods and Services Sold	40	64	101	137
Service [Member]
Revenue from Contract with Customer, Including Assessed Tax	13,730	8,468	23,613	17,788
Cost of Goods and Services Sold	$ 10,929	$ 7,216	$ 19,131	$ 14,943