CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Net sales	$ 40,133,000	$ 35,907,000
Cost of sales	5,786,000	5,180,000
Gross profit	34,347,000	30,727,000
Operating expenses:
Selling, general and administrative	27,155,000	21,481,000
Research and development	10,906,000	8,942,000
Total operating expenses	38,061,000	30,423,000
(Loss) income from operations	(3,714,000)	304,000
Other income, net
Interest and other income	1,016,000	636,000
Interest and other expense, net	(8,000)	(7,000)
Total other income, net	1,008,000	629,000
(Loss) income before taxes	(2,706,000)	933,000
Provision for income taxes	5,000	55,000
Net (loss) income attributable to Glaukos Corporation stockholders	$ (2,711,000)	$ 878,000
Basic net (loss) income per share, attributable to Glaukos Corporation stockholders	$ (0.08)	$ 0.03
Diluted net (loss) income per share, attributable to Glaukos Corporation stockholders	$ (0.08)	$ 0.02
Weighted average shares used to compute basic net (loss) income per share attributable to Glaukos Corporation stockholders	34,677	34,146
Weighted average shares used to compute diluted net (loss) income per share attributable to Glaukos Corporation stockholders	34,677	37,742