Looks like the MMs covered their shorts

Historical Short Selling Data For IENT

Date	VolShorted	High	Low	Close	Chg	ShortVol	RegularVol
Sep 18	0%	0.14	0.13	0.13	-13.33%	0	23,600
Sep 17	0%	0.15	0.15	0.15	0.00%	0	2,000
Sep 16	100.00%	0.15	0.15	0.15	-16.67%	551	551
Sep 13	10.01%	0.18	0.15	0.18	-14.29%	1,701	17,000
Sep 12	35.59%	0.21	0.18	0.21	+16.67%	5,000	14,050
Sep 11	32.99%	0.18	0.17	0.18	+5.88%	3,299	10,000
Sep 10	15.81%	0.17	0.14	0.17	-5.56%	3,600	22,772
Sep 09	14.48%	0.18	0.14	0.18	0.00%	5,000	34,529
Sep 06	13.87%	0.18	0.14	0.18	-14.29%	6,400	46,135