Geographical Segment Information - Summary of Revenue Generated in Product Category for Years Indicated (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 11,476	$ 12,728
Product Category | United States | Revenues
Segment Reporting Information [Line Items]
Revenues	$ 11,177	$ 12,546
Percentage of Revenues	100.00%	100.00%
Product Category | United States | Revenues | NeuroStar Advanced Therapy System
Segment Reporting Information [Line Items]
Revenues	$ 2,594	$ 3,350
Percentage of Revenues	23.00%	27.00%
Product Category | United States | Revenues | Treatment Sessions
Segment Reporting Information [Line Items]
Revenues	$ 8,193	$ 8,778
Percentage of Revenues	74.00%	70.00%
Product Category | United States | Revenues | Other
Segment Reporting Information [Line Items]
Revenues	$ 390	$ 418
Percentage of Revenues	3.00%	3.00%
Product Category | International | Revenues
Segment Reporting Information [Line Items]
Revenues	$ 299	$ 182
Percentage of Revenues	100.00%	100.00%
Product Category | International | Revenues | NeuroStar Advanced Therapy System
Segment Reporting Information [Line Items]
Revenues	$ 100	$ 72
Percentage of Revenues	33.00%	40.00%
Product Category | International | Revenues | Treatment Sessions
Segment Reporting Information [Line Items]
Revenues	$ 77	$ 19
Percentage of Revenues	26.00%	10.00%
Product Category | International | Revenues | Other
Segment Reporting Information [Line Items]
Revenues	$ 122	$ 91
Percentage of Revenues	41.00%	50.00%